package com.xiaolun;

import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * @Author 硕鼠
 * @Date 2020/5/8 16:28
 * @Version 1.0
 * @Description 文件说明
 */
public class TestSleep2  {
    public static void main(String[] args) throws InterruptedException {
        //打印当前系统时间
        Date startTime = new Date(System.currentTimeMillis());
        while (true){
            Thread.sleep(1000);
            System.out.println(new SimpleDateFormat("HH:mm:ss").format(startTime));
            startTime = new Date(System.currentTimeMillis());//更新当前时间
        }
    }

    //模拟倒计时
    public static void tenDown() throws InterruptedException {
        int num = 10;
        while (true){
            Thread.sleep(1000);
            System.out.println();
            if (num <= 0){
                break;
            }
        }
    }
}
